Henry Gitner Philatelists, Inc.

France Ballon Monte:Le “Kepler” cover (neatly trimmed at top and bottom, may have been used as a periodical wrapper), Jan 10, 1871 Paris cancel, Jan 12, 1871 backstamp (town name unclear), carried 160 kg of mail. The aeronauts could hear Prussian artillery aimed at Paris even though they had been airborne in frightful cold for over 5 hours. (BM57 €500)